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The APB-AP provides the following specific MEM-AP features:
Auto-incrementing of the Transfer Address Register with address wrapping on 1k byte boundaries.
Slave memory port disabling: a slave interface is provided through the APB-MUX to enable another APB master to connect to the same memory map as the APB-AP
The AHB-AP does not support the following MEM-AP features:
Big endian. All accesses performed as expected to be to a little endian memory structure.
Sub-word transfers. Only word transfers are supported
The APB-AP supports a synchronous APB interface. The internal DAP interface and the APB interface operate from DAPCLK.
The APB-AP has one clock domain, DAPCLK. It drives the complete APB-AP. This must be connected to PCLKDBG for the APB interface.
DAPRESETn resets the internal DAP interface and the APB interface.
| Copyright © 2004-2009 ARM. All rights reserved. | ARM DDI 0314H |
| Non-Confidential | |
| PDF version | |
| Home > Debug Access Port > APB-AP > Implementation features |